Hello,
Keratosis pilaris rubra is one such possibility which needs to be ruled out in your case. Treatment includes tretinoin or Triamcinolone cream or Adapalene, a retinoid medication. Exfoliation, intensive moisturizing creams, creams and lotions containing alpha hydroxy acids and urea may be used to temporarily improve the appearance and texture of affected skin.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
i had the same problem when i was little , you are eather allergic to something , or u have ur showers way to hot , or you sit around really hot things like heaters and steam all the time so ur body is just use to being extreamly warm alll the time